here given angle = 300 of inclination, on incline plane if angle given is "α" and coefficient of friction is "k" then, sliding friction force = k×m×g×Sin(α)
here in our question this Force will be equal to 10N, Mass given 10Kg, g=gravity =9.8 m/s2...
Hence "k×m×g×Sin(α)=10"
=> k=coefficientoffriction=m×g×sin(α)10
=> k=10×9.8×0.510=4.91=0.204
Hence Answer = 0.2
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